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STOCK-BASED COMPENSATION - Principal assumptions used to determine fair value of stock options (Details) - CAD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Share-based Payment Arrangements [Abstract]    
Weighted average fair value $ 9.65 $ 7.46
Risk-free interest rate 1.00% 0.30%
Dividend yield 2.80% 3.40%
Volatility of Class B Non-Voting Shares 23.10% 23.10%
Weighted average expected life 5 5.1